本文選題：鈦鐵礦 + 鉻鐵礦　； 參考：《昆明理工大學(xué)》2015年碩士論文

【摘要】：本論文以莫桑比克某鈦粗精礦為研究對(duì)象,對(duì)該粗精礦進(jìn)行了詳細(xì)的工藝礦物學(xué)研究和生料直接入選選礦試驗(yàn)研究、熟料(焙燒后)鈦鐵礦選礦試驗(yàn)研究、熟料鉻鐵礦選礦試驗(yàn)研究、金紅石與鋯英石分離等試驗(yàn)研究,確定了適宜的工藝生產(chǎn)流程,為工業(yè)化處理鈦粗精礦提供基礎(chǔ)的技術(shù)支撐。該礦樣主要經(jīng)濟(jì)礦物為鈦鐵礦、鉻鐵礦,主要脈石為石英、鋯英石、微量的獨(dú)居石等,礦樣中顆粒磨圓度高。該鈦粗精礦,含TiO242.56%,含Cr2032.41%,含鐵36.90%。由原礦工藝礦物學(xué)研究可知,原礦主要金屬礦物為鈦鐵礦和鉻鐵礦,本實(shí)驗(yàn)的重點(diǎn)是得到Ti02含量為46%-52%的鈦精礦,Cr2O3含量為27%～60%的鉻精礦。在對(duì)鈦精礦和鉻精礦的分離過程中,主要包括兩方面：預(yù)選和鈦鉻富集。因?yàn)殁佽F礦和鉻鐵礦比磁化系數(shù)較金紅石和鋯英石大,通過磁選后可以得到鈦鐵礦和鉻鐵礦的混合粗精礦；鈦鐵礦和鉻鐵礦比重和比磁化系數(shù)相近,直接采用重、磁選工藝很難使鈦鐵礦和鉻鐵礦進(jìn)行分離；將鈦鐵礦和鉻鐵礦的混合粗精礦,采用回轉(zhuǎn)窯、流化態(tài)床或沸騰爐在焙燒工藝參數(shù)為操作溫度770℃、進(jìn)料速率3.0kg/h、對(duì)應(yīng)平均停留時(shí)間36min進(jìn)行氧化焙燒,自然冷卻可以很好的富集鈦；對(duì)氧化焙燒富集后的礦物在磁場(chǎng)為0.3T的干式磁選機(jī)上進(jìn)行選別,可以得到鈦品位為47.94%,回收率78%.52,含Cr2030.23%的鈦精礦。鉻粗精礦的富集是通過還原焙燒進(jìn)行的。還原焙燒-磁選最優(yōu)參數(shù)為：焙燒時(shí)間90min,溫度900℃,還原碳用量10%；通過還原焙燒后得到的礦物在磁場(chǎng)為0.3T的干式磁選下進(jìn)行分離,可得品位為28.65%、作業(yè)回收率為90.13%的鉻精礦。本實(shí)驗(yàn)的主要目的有： (1)得到品位為47.94%、回收率為78.52%,Cr203含量僅為0.23%的鈦精礦；品位為28.65%、回收率為84.18%的鉻精礦； (2)確定合理的實(shí)驗(yàn)方案和實(shí)驗(yàn)條件。
[Abstract]:In this paper, a coarse titanium concentrate in Mozambique was studied. The process mineralogy of the coarse concentrate was studied in detail, and the direct dressing test of raw material and clinker (calcined) ilmenite ore dressing were carried out. The experimental study on clinker chromite concentration and separation of rutile and zircon has determined the suitable technological process and provided the basic technical support for industrial treatment of titanium coarse concentrate. The main economic minerals are ilmenite, chromite, quartz, zircon, monazite, etc. The coarse titanium concentrate contains TIO 242.56, Cr 2032.41 and iron 36.90. From the mineralogical study of raw ore process, it can be seen that the main metallic minerals of the ore are ilmenite and chromite. The key point of this experiment is to obtain the chromium concentrate with Ti02 content of 46 ~ 52% and Cr _ 2O _ 3 content of 27 ~ 60%. In the separation process of titanium concentrate and chromium concentrate, there are two main aspects: preconcentration and titanium chromium enrichment. Because the specific magnetization coefficient of ilmenite and chromite is larger than that of rutile and zircon, the mixed coarse concentrate of ilmenite and chromite can be obtained by magnetic separation. It is difficult to separate ilmenite from chromite by magnetic separation process, the mixed coarse concentrate of ilmenite and chromite is used in rotary kiln, fluidized bed or fluidized bed, and the operating temperature is 770 鈩，

本文編號(hào)：1979316